Natterer's bat can be quite similar to Daubenton's, but can be recognised at close range by its pink face, longish, forward pointing ears and white underside. It is most often found foraging over hedgerows, fields or in woodland. It is a secretive bat, often roosting deep inside stone walls, entering through a tiny crevice as little as 15mm across. Less than 30 breeding roosts are known in the county, mainly in old buildings, although surveys of old barns are gradually revealing more. Natterer's bats emerge late in the evening and are reluctant to use places which are lit.
In winter, this species hibernates in caves, disused tunnels, etc. where the temperature is fairly stable.
Hibernating Natterer's bat. Photo Sonia Allen